Improvement in casting auger gate-hjnges



FIG.7.

INVENTQH.

ATTEST n lndtlexv gieten aient @pitre BENOIT EOUX, OE OINOINNATI, OHIO, AssIoNOE To M. GREENWOOD e OO., OE SAME PLACE.

Letters Patent No. 99,712

,dated February/.8, 1870. i

IMPROVEMENT IN CASTING AUGER GATE-'HING-ES.

The Schedule referred t0 in these Letters Patent and making parl'. of the same.

` emtions, as follows:

Separate patterns were prepared of the pintle and of the hinge-body, and a separate cast being taken of thepintle, said cast was laid in the vbody-n'iould preparatory to pouring or casting of the body-portion about it. 1

This modeof manufacture was subject to several serious defects. For example, in` drawing the pintle pattern from its mould, which had to be done in the direction of its helix, particles ofsand, adhering to the pattern, were liable to eutchannels lin the mould, which, when the east was made, left unsightly ridges on the pintle, that iu the use of the hinge, obstructed or prevented'the proper motions of the'hinge.

Another-detect was found to exist in blow-holes at the junction of the -pint-le and body, which weakened that portion of the hinge where most strength was required.

In addition to the above-'cited defects, the construction of a separate pattern for the pintle, and .necessity of casting the same separately from the other portions, and then of carefully placing it in the final mould, inrolved a large expenditure-of labor and skill, with occasional liability ofmisplacemcnt of parts, from which my manufacture is wholly free.

Iavoid the defectsabovc cited by moulding vmy hinge from a single pat-tern, having the two sides of the male member in reverse, and' the parting line so arranged and located as to enable the two parts ofthe mould to separate without diiiicnlty, for withdrawal vof the pattern.

Figure 1 is a plan of the"drag, or lower half of the mould, with the pattern of the male member of an auger-hinge.

Figure 2 is a longitudinal section, at the line :v-x of the mould and pattern.

lille git'.

Figure 3 is a transverse section of the mould, at the Figure 4 is a partially sectionized side elevation of the male member.

Figures 5 and 6 are perspective views of my hinge, on opposite sides thereof.

Figure 7 isa top view of the piutle.

ln order to secure a perfect and easy separation' of the two parts of my mould from a pattern of the entire hinge, I arrange the parting-line as follows;

Beginning at thev point 1, where the top of the knuckle A is iutersected by the pla-ne ofthe hingeplate B, my partingeline crosses a portion of thetop A of theknuckl'e, toits intersection, at the point 2, with .the lower edge of the helical thread of the pintle C,

whence said line ascends vertically, on the peiiphery of the thread, to theypoiut 3, where it meets the up# per edge of the said threadLwl-xich it follows to a point, 4, whence it strikes square across the hollow of the thread to a point, 5, on thelower edge ofthe opposite thread, as much to thea-ight of the point 3 as the point 4 is to its left. edge of said thread to a point, 6, vertically over the point- 3, whence it ascends vertically the periphery off said thread to the point 7, on the upper `edge thereof, and follows said edge to the top of the pintle, at 8,

whosevright edge it follows to the point 9, whence,

striking obliquely across the top to the left edge of' the pintlc at 10, it follows said edge to a point, 11, -at the summit of the thread 4on which it commenced, but on the obverse side of the pintle, which it descends by a line, 11, 12, 13, 14, 15, 16,17, the precise counterpart of that just described, and reaching the outer edge of the knuckle at a point, 1,8, diametrically opposite the point 1,. passes around said knuckle, in the plane of its axis, and around and in the plane of the plate B, to

the place ot' beginning.

.I claim, as a new article of manufacture- An auge1"hinge, whose male member is cast in one piece and at one operatiomiu the lnanner herein designated. I

In testimony of which invention, I heneunto set my hand.

Witnesses t GEO. H. KNIGHT, J Anas H. LAYMAN.

BENOIT ROUX.

From the point 5 it followsthe lower 

